Hat lamp



FIG. 1 is an isometric view of a hat lamp in accordance with the newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken-line disclosure represents portions of the article whichforms no part of the claimed design.

CLAIM The ornamental design for a hat lamp, as shown and described.